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Monthly climate in Rumia, Poland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Rumia features a oceanic climate (Cfb). Temperatures typically range between 1 °C (34 °F) and 18 °C (65 °F) through the year, but rarely can drop to -13 °C (8 °F) or can rise to as high as 30 °C (86 °F). The average annual precipitation amounts to about 778 mm (30.6 inches) and receives 154 rainy days on the 1 mm (0.04 inches) threshold annually. Rumia enjoys an average of 3410 hours of sunshine throughout the year, and daylight varies from 7 hours 22 minutes to 17 hours 6 minutes per day.

Monthly average temperatures in Rumia, Poland

The warmest months in Rumia are June, July and August, with daily mean temperatures ranging from 17 to 18 °C (63 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 2 °C (34 - 36 °F) throughout the day. On average each year, Rumia experiences 8 days above 25 °C (77.0 °F) and 56 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rumia. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(51°F)		13°C
(55°F)		14°C
(58°F)		20°C
(69°F)		24°C
(76°F)		29°C
(85°F)		30°C
(86°F)		29°C
(85°F)		28°C
(83°F)		20°C
(68°F)		15°C
(59°F)		10°C
(50°F)
Mean maximum8°C
(47°F)		10°C
(50°F)		12°C
(54°F)		18°C
(64°F)		22°C
(71°F)		24°C
(76°F)		27°C
(80°F)		27°C
(80°F)		26°C
(79°F)		19°C
(66°F)		13°C
(56°F)		9°C
(48°F)
Average high3°C
(37°F)		3°C
(37°F)		6°C
(42°F)		10°C
(50°F)		14°C
(58°F)		20°C
(68°F)		21°C
(70°F)		21°C
(71°F)		18°C
(64°F)		13°C
(56°F)		8°C
(46°F)		4°C
(39°F)
Daily mean1°C
(34°F)		1°C
(34°F)		3°C
(37°F)		7°C
(44°F)		11°C
(52°F)		17°C
(63°F)		18°C
(65°F)		18°C
(65°F)		15°C
(59°F)		11°C
(51°F)		6°C
(43°F)		2°C
(36°F)
Average low-1°C
(31°F)		-1°C
(30°F)		0°C
(33°F)		3°C
(38°F)		8°C
(46°F)		13°C
(56°F)		15°C
(59°F)		15°C
(59°F)		12°C
(54°F)		8°C
(47°F)		5°C
(40°F)		1°C
(33°F)
Mean minimum-7°C
(19°F)		-7°C
(19°F)		-5°C
(23°F)		-1°C
(30°F)		2°C
(36°F)		8°C
(46°F)		11°C
(53°F)		10°C
(51°F)		7°C
(46°F)		4°C
(39°F)		-1°C
(31°F)		-5°C
(24°F)
Minimum-13°C
(8°F)		-13°C
(9°F)		-13°C
(9°F)		-3°C
(26°F)		0°C
(33°F)		6°C
(42°F)		10°C
(50°F)		9°C
(49°F)		6°C
(43°F)		3°C
(37°F)		-4°C
(26°F)		-9°C
(17°F)

Compare climate in Rumia with other places

Compare temperature, precipitation, sunshine, UV index in Rumia, Poland with other places around the world.

Monthly average precipitation in Rumia, Poland

Rumia usually has the most precipitation in July, September and October, with an average of 14 rainy days and 89 mm (3.5 inches) of precipitation per month. The driest months in Rumia are February, March and April. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rumia. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)54 (2.1)45 (1.8)52 (2.0)38 (1.5)67 (2.6)65 (2.6)104 (4.1)71 (2.8)79 (3.1)85 (3.4)56 (2.2)63 (2.5)
Average precipitation days (≥ 1 mm)12111391310151312161515

Monthly sunshine hours in Rumia, Poland

The sunniest months in Rumia are May, June and July, when the sun shines an average of 14 hours 5 minutes a day. Least sunny months in Rumia: January, November and December receive an average of 4 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rumia. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours98190260352417444434391306237151124
Mean daily daylight hours7h 57m9h 44m11h 53m14h 6m16h 4m17h 6m16h 33m14h 47m12h 38m10h 27m8h 27m7h 22m

Solar UV radiation in Rumia, Poland

Rumia experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 6 - 7, which corresponds to the High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Rumia UV Index data.

Average daily maximum UV levels by month for Rumia. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)124567765311